IBM 2498B24 User Guide - Page 49

Ethernet LED patterns, POST and boot specifications, POST, Boot

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Ethernet LED patterns Each Ethernet port has two LEDs, which are described in Table 7 Table 7. Ethernet LED patterns LED name LED color Recommended Status of hardware action Ethernet speed LED No light (right) Port speed is 10 Mb/sec. No action is required. Steady green Port speed is 100 Mb/sec. No action is required. | Ethernet link status No light No link detected Verify the Ethernet | LED (left) cable is connected | correctly. | Blinking amber There is link activity No action is required. | (traffic). | Solid Amber There is a link. No action is required. POST and boot specifications When the switch is turned on or rebooted, the switch performs POST. Total boot time with POST is up to 3 minutes. POST can be omitted after subsequent reboots by using the fastboot command or entering the diagDisablePost command to persistently disable POST. For more information about these commands, refer to the Fabric OS Command Reference Manual. POST The success or failure results of the diagnostic tests that run during POST can be monitored through the error log or the command line interface. POST includes the following steps: 1. Preliminary POST diagnostics are run. 2. Operating system is initialized. 3. Hardware is initialized. 4. Diagnostic tests are run on several functions, including circuitry, port functionality, memory, statistics counters, and serialization. Boot In addition to POST, boot includes the following steps after POST is complete: 1. Universal port configuration is performed. 2. Links are initialized. 3. Fabric is analyzed, and if any ports are connected to other switches, the switch participates in a fabric configuration. 4. Switch obtains a domain ID and assigns port addresses. 5. Unicast routing tables are constructed. 6. Normal port operation is enabled. Chapter 3. Operating the switch 25

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Ethernet LED patterns
Each Ethernet port has two LEDs, which are described in Table 7
Table 7. Ethernet LED patterns
LED name
LED color
Status of hardware
Recommended
action
Ethernet speed LED
(right)
No light
Port speed is 10
Mb/sec.
No action is required.
Steady green
Port speed is 100
Mb/sec.
No action is required.
Ethernet link status
LED (left)
No light
No link detected
Verify the Ethernet
cable is connected
correctly.
Blinking amber
There is link activity
(traffic).
No action is required.
Solid Amber
There is a link.
No action is required.
POST and boot specifications
When the switch is turned on or rebooted, the switch performs POST. Total boot
time with POST is up to 3 minutes. POST can be omitted after subsequent reboots
by using the
fastboot
command or entering the
diagDisablePost
command to
persistently disable POST.
For more information about these commands, refer to the
Fabric OS Command
Reference Manual
.
POST
The success or failure results of the diagnostic tests that run during POST can be
monitored through the error log or the command line interface.
POST includes the following steps:
1.
Preliminary POST diagnostics are run.
2.
Operating system is initialized.
3.
Hardware is initialized.
4.
Diagnostic tests are run on several functions, including circuitry, port
functionality, memory, statistics counters, and serialization.
Boot
In addition to POST, boot includes the following steps after POST is complete:
1.
Universal port configuration is performed.
2.
Links are initialized.
3.
Fabric is analyzed, and if any ports are connected to other switches, the switch
participates in a fabric configuration.
4.
Switch obtains a domain ID and assigns port addresses.
5.
Unicast routing tables are constructed.
6.
Normal port operation is enabled.
Chapter 3. Operating the switch
25
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